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Réponse :

bonjour

Explications étape par étape

3x(2/3+4/6)=3x((2x2)/(3x2)+4/6)=3x(4/6+4/6)=3x8/6=24/6=4

2)5/6-3/18+2/9=(5x3)/(6x3)-3/18+(2x2)/(9x2)=15/18-3/18+4/18=16/18=(8x2)/(9x2)=8/9

3)4/3-1/3x5/2=4/3-5/6=(4x2)/(3x2)-5/6=8/6-5/6=3/6=(3x1)/(3x2)=1/2

4)4-2/3x5+5/3x3/7=4-10/3+15/21=12/3-10/3+15/21=2/3+15/21=(2x7)/(3x7)+15/21=14/21+15/21=29/21

Verified answer

Réponse :

Explications étape par étape

Bonjour

3 x (2/3 + 4/6)

= 3 x (4/6 + 4/6)

= 3 x 8/6

= 3/6 x 8

= 1/2 x 8

= 4

5/6 - 3/18 + 2/9

= 15/18 - 3/18 + 4/18

= 19/18 - 3/18

= 16/18

= (2 x 8)/(2 x 9)

= 8/9

4/3 - 1/3 x 5/2

= 4/3 - 5/6

= 8/6 - 5/6

= 3/6

= 1/2

4 - 2/3 x 5 + 5/3 x 3/7

= 4 - 10/3 + 5/7

= 84/21 - 70/21 + 15/21

= 14/21 + 15/21

= 29/21